| Component: (Network and Table) | |
|---|---|
| Network | 100680 - Disclosure - Commitments and Contingencies - Future Annual Minimum Lease Payments (Detail) (http://www.ambarella.com/20170131/taxonomy/role/DisclosureCommitmentsAndContingenciesFutureAnnualMinimumLeasePaymentsDetail) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0001280263 (http://www.sec.gov/CIK) |
| Commitments And Contingencies Disclosure [Abstract] | Period [Axis] |
|---|---|
2017-01-31 | |
Commitments And Contingencies Disclosure [Abstract] | |
2018 | |
2019 | |
2020 | |
2021 | |
2022 | |
Total future annual minimum lease payments |